Small cleanups: fix peer-dep warnings, yarn-deduplicate, use Flow's exact_by_default.
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chrisbobbe
changed the title
exact_by_default.exact_by_default.
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Hi Chris! To get the backend to work, you should install pipenv. I'm using it as a sort of NPM for Python (per-project dependency management). https://pipenv.pypa.io/en/latest/ Installation instructions there^^ Let me know if you have any questions, but this looks fantastic. Given you haven't touched Python, the Python checks shouldn't be necessary. I'll see if the GitHub Actions pass. |
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Got it, |
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OK, and after running I can't say it's impossible that the I do think that the benefits of deduplicating outweigh the risks. ~All versions of a given package have some bugs, and it's easier to be acquainted with them if we don't have lots of instances of a package lying around at lots of different versions. Observations from my manual testing:
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kevinjcliao
requested changes
May 26, 2021
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| // `Card` has a caller that passes this, but `Card` doesn't do | ||
| // anything with it. Should we remove it? | ||
| hospitalId: number, // eslint-disable-line react/no-unused-prop-types | ||
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Yes, this was a mistake. Do you mind removing it?
Done with this command, using Yarn 1.22.10: yarn add --dev yarn-deduplicate This will help us trim out some dependencies that were installed multiple times, at different versions, when version-range constraints would actually allow having one installation at a particular version: https://www.npmjs.com/package/yarn-deduplicate https://github.com/atlassian/yarn-deduplicate
yarn-deduplicate, which we added to `devDependencies` in the previous commit, cleans up `yarn.lock` by removing duplicates: https://www.npmjs.com/package/yarn-deduplicate https://github.com/atlassian/yarn-deduplicate Done using Yarn 1.22.10. Note that the package's docs (linked just above) report that the package is obsolete when using Yarn v2 because Yarn v2 supports package deduplication natively. Since this command found something to do, I assume we haven't been using Yarn v2. We could go to the trouble of upgrading, but it looks like there's some nontrivial work involved, and some packages might not yet work well with v2, and I have no experience with v2: https://yarnpkg.com/getting-started/qa#why-should-you-upgrade-to-yarn-modern
Done with the following commands, using Yarn 1.22.10:
yarn add @types/react --latest
yarn add @babel/core postcss --dev --latest
yarn yarn-deduplicate && yarn
after seeing the warnings below, on an initial run of `yarn` (i.e.,
one that starts with `node_modules` not existing).
(The `yarn-deduplicate` command is a routine cleanup command we
added in a recent commit. It found something to do after running the
other two commands.)
Each line in the output below represents an assertion from one of
our project's dependencies that our project must add a direct
dependency on { @types/react, @babel/core, postcss } at a version in
a specific range:
https://docs.npmjs.com/cli/v7/configuring-npm/package-json#peerdependencies
https://nodejs.org/es/blog/npm/peer-dependencies/
Luckily, all the ranges for each of those three packages are wide
enough that they intersect at at least one specific version. Even
better: for all three packages, the intersection isn't just *one*
specific version -- it includes the default range that gets
specified when you just `yarn add ... --latest` the package. So, do
that, for all three.
From the output, it looks like the @types/react warning stems from
our top-level dependency react-markdown, and that's under
`dependencies`. So, install @types/react under `dependencies`.
From the output, it looks like all the @babel/core and postcss
warnings stem from parcel, which is under `devDependencies`. So,
install @babel/core and postcss under `devDependencies`.
warning " > react-markdown@6.0.1" has unmet peer dependency "@types/react@>=16".
warning "parcel > @parcel/config-default > @parcel/transformer-babel@2.0.0-beta.2" has unmet peer dependency "@babel/core@^7.12.0".
warning "parcel > @parcel/config-default > @parcel/transformer-postcss@2.0.0-beta.2" has unmet peer dependency "postcss@^8.2.1".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/helper-compilation-targets@7.13.16" has unmet peer dependency "@babel/core@^7.0.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/plugin-transform-flow-strip-types@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/plugin-transform-typescript@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env@7.13.15" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react@7.13.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @parcel/babel-preset-env@2.0.0-beta.2" has unmet peer dependency "@babel/core@^7.12.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/plugin-transform-flow-strip-types > @babel/plugin-syntax-flow@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/plugin-transform-typescript > @babel/helper-create-class-features-plugin@7.13.11" has unmet peer dependency "@babel/core@^7.0.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/plugin-transform-typescript > @babel/plugin-syntax-typescript@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining@7.13.12" has unmet peer dependency "@babel/core@^7.13.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-async-generator-functions@7.13.15" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-class-properties@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-dynamic-import@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-export-namespace-from@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-json-strings@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-logical-assignment-operators@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-nullish-coalescing-operator@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-numeric-separator@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-object-rest-spread@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-optional-catch-binding@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-optional-chaining@7.13.12" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-private-methods@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-unicode-property-regex@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-async-generators@7.8.4" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-class-properties@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-dynamic-import@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-export-namespace-from@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-json-strings@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-logical-assignment-operators@7.10.4" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-nullish-coalescing-operator@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-numeric-separator@7.10.4" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-object-rest-spread@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-optional-catch-binding@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-optional-chaining@7.8.3" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-syntax-top-level-await@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-arrow-functions@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-async-to-generator@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-block-scoped-functions@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-block-scoping@7.13.16" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-classes@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-computed-properties@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-destructuring@7.13.17" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-dotall-regex@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-duplicate-keys@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-exponentiation-operator@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-for-of@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-function-name@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-literals@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-member-expression-literals@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-modules-amd@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-modules-commonjs@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-modules-systemjs@7.13.8" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-modules-umd@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-named-capturing-groups-regex@7.12.13" has unmet peer dependency "@babel/core@^7.0.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-new-target@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-object-super@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-parameters@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-property-literals@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-regenerator@7.13.15" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-reserved-words@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-shorthand-properties@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-spread@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-sticky-regex@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-template-literals@7.13.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-typeof-symbol@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-unicode-escapes@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-transform-unicode-regex@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/preset-modules@0.1.4" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > babel-plugin-polyfill-corejs2@0.2.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > babel-plugin-polyfill-corejs3@0.2.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > babel-plugin-polyfill-regenerator@0.2.0" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react > @babel/plugin-transform-react-display-name@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react > @babel/plugin-transform-react-jsx@7.13.12" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react > @babel/plugin-transform-react-jsx-development@7.12.17" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react > @babel/plugin-transform-react-pure-annotations@7.12.1" has unmet peer dependency "@babel/core@^7.0.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > @babel/plugin-proposal-unicode-property-regex > @babel/helper-create-regexp-features-plugin@7.12.17" has unmet peer dependency "@babel/core@^7.0.0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-env > babel-plugin-polyfill-corejs2 > @babel/helper-define-polyfill-provider@0.2.0" has unmet peer dependency "@babel/core@^7.4.0-0".
warning "parcel > @parcel/config-default > @parcel/transformer-babel > @babel/preset-react > @babel/plugin-transform-react-jsx > @babel/plugin-syntax-jsx@7.12.13" has unmet peer dependency "@babel/core@^7.0.0-0".
`Number` is for the wrapper object, i.e., the result of calling `new Number(...)`, so it's rarely quite the right thing to use. The lowercase form is for literal values [1] . Unfortunately, code editors will sometimes suggest the capitalized type in autocomplete, which is unhelpful. [1] https://flow.org/en/docs/types/primitives/
This small error would be caught when we make more of our object types exact, in the next commit. Passing the prop wasn't intentional [1], so stop passing it. [1] g0v#83 (comment)
It looks like all these object types would benefit from being exact;
so, make them exact. These were using the implicitly inexact syntax
(`{foo: number}`), not the explicitly inexact syntax
(`{foo: number, ...}`), but they were still inexact.
We know we've caught all implicitly inexact object types because the
`implicit-inexact-object` [1] lint is set to `error`, and Flow
doesn't report any errors at this commit.
We're about to turn on `exact_by_default` [2], which will change the
meaning of the `{foo: number}` syntax to implicitly *exact*, leaving
the option of `{| foo: number |}` for explicitly exact, and
`{foo: number, ...}` for explicitly inexact.
That'll make it easier to get tighter type checking on object types
in general, since most of the time we want them to be exact.
[1] https://flow.org/en/docs/linting/rule-reference/#toc-implicit-inexact-object
[2] https://flow.org/en/docs/config/options/#toc-exact-by-default-boolean
This was a much-anticipated feature [1] that's available in recent
versions of Flow.
We'll still be able to make object types inexact, but we'll have to
do it explicitly, with a marked syntax. That seems appropriate:
since we don't want to use them as often, it makes sense for them to
be marked, and for exact object types to be unmarked.
As explained in the docs [2],
````
Set this to `true` to indicate that Flow should interpret
object types as exact by default. When this flag is `false`, Flow
has the following behavior:
```js
{foo: number} // inexact
{| foo: number |} // exact
{foo: number, ...} // inexact
```
When this flag is `true`, Flow has the following behavior:
```js
{foo: number} // exact
{| foo: number |} // exact
{foo: number, ...} // inexact
```
The default value is `false`.
````
[1] https://medium.com/flow-type/on-the-roadmap-exact-objects-by-default-16b72933c5cf
[2] https://flow.org/en/docs/config/options/#toc-exact-by-default-boolean
In the previous commit, we enabled the `exact_by_default`
option [1].
Now, we can make our exact object types unmarked. Since we expect to
use exact object types more often than inexact ones, it makes sense
for the exact ones to be unmarked, and to require the inexact ones
to be marked (with `, ...` as in `{foo: number, ...}`).
To confirm that this works, try adding a `nonsense="123"` prop to
the `Card` callsite in frontend/Components/VaccineInfo/Cards.jsx.
[1] https://flow.org/en/docs/config/options/#toc-exact-by-default-boolean
Continuing the refactor in a760f75.
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Thanks for the review! Revision pushed. |
kevinjcliao
approved these changes
May 27, 2021
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Thanks for your important work on this!
My goals here are to make a few small project-level fixes, without changing user-facing behavior. Please don't hesitate to let me know if something isn't clear or seems wrong.
But in particular, after this series of commits:
yarnis now down to zero, so new warnings will be conspicuous (these can be important)yarn-deduplicateis left in as a tool that people can use to clean up commits that change dependencies.I've tested this by running
yarn lintandyarn flowat each commit (runningyarnbefore those commands, on the commits that change the dependencies), and I've also tested the tip commit by runningyarn frontend—though without also runningyarn backend, since that seemed like a bit of work to get fully set up. I'd really appreciate if you'd run these commits (or perhaps just the tip commit) through your usual manual tests, and other automated tests I might have missed, or else give me a nudge to getyarn backendworking and I'll give it a try. 🙂When I ran
yarn frontendat the tip of this series of commits, I was able to see this (and I presume I'd see more if I got set up to runyarn backendtoo); the loading indicator goes forever because it can't load any data:The particular error message I've encountered with
yarn backendisand presumably it wouldn't be hard for me to install something and get past this error, I just haven't yet.